Carburetor



June 8, 1937. A, C N 2,083,428

CARBURETOR Filed Aug. 10, 1956 2 Sheets-Sheet 1 filia d/15077 WENT BY myzw ATTOR NEYS A. CARSON June 8, 19 37.

CARBURETOR Filed Aug. 10, 1956 2 Sheets-Sheet 2 ATTORNEYS Patented June 8, 1937 UNITED STATES PATENT OFFICE 2,088,428 CARBURETOB Andy Carson, Tampa, Fla.

Application August 10, 1936, Serial No. 95,219,

4 Claims.

This invention relates to carburetors for internal combustion engines, and has for the primary object the provision of a device of this character which will provide fuel in amounts to meet the needs of an engine while operating at idling speed and may be manually adjusted to vary said amounts of fuel and will automatically increase and decrease the amount of fuel in accordance with positions of the throttle valve of the carburetor to meet varying loads and speeds of the engine.

- With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts 5 to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which Figure l'is a side elevation, partly in section, illustrating a carburetor constructed in accordance with my invention.

Figure 2 is a top plan view illustrating the same.

Figure 3 is a sectional view taken on the line 3-3 of Figure 1.

Figure 4 is a detail sectional view taken on the line 4-4 of Figure 2.

Figure 5 is a detail sectional view taken on the line 5-5 of Figure 2.

5 indicates the body of a carburetor composed of sections 2 and 3 detachably connected, as shown at 4. The section 3 forms an air chamber having a main air intake 5 controlled by a choke valve 6 of a, conventional construction. Certain walls of the sections 3 protrude into the section 2 and terminate in an annular seat 1 engaged by a disclike valve 8. The section 2 includes the usual discharge neck 9 of the carburetor and which is de- 40 tachably secured to an intake manifold of an engine in the usual manner. operates in the neck 9, the stem of which is indicated by the character II and extends exteriorly of the neck to which the usual controls are connected. The section 2 has an auxiliary air inlet l2 controlled by a self-closing gate 13 adapted to open under the influence of suction. O

A jet I4 is detachably secured to the disc-like valve 8 and includes a head 15 and a stem I6. 50 The stem 16 has a passage 11 therethrough, one end of whichcommunicates with the interior of the head l5 and the other end communicates withthe interior of a housing l8 which slidably supports the stem 16. The housing 18 is arranged 55 in the air chamber of the section 3 of the car- Referrlng in detail to the drawings, the numeral A throttle valve In buretor and is detachably. secured to a member '19 mounted in opposite walls of the section 3. Said member 19 has fuel passages 20 and 21, each communicating with the interior of the housing I8 by a passage 22 in the form of a valve seat 23. A ball check valve 24 contacts the seat 23 and is also engaged by one end of the stem 18 of the Jet 14. A spring 25 is supported by the housing 18 and acts on the stem to urge thelatter in the direction for seating the ball valve 24. A needle valve 26 is threaded in the member ID and acts to control the flow oi fuel from the passage 21 to the passage 22.

oppositely extending housings21 and 28. The passage 20 communicates with the housing 21 while the. passage 2| communicates with the housing 28. A common fuel inlet 29 is provided for both of the housings 21 and 28 and the fuel inlet 29 has valve seats 30 and 3|. Operating in conjunction with the valve seat 3| is a needle valve 32 for controlling theflow of fuel from the source to the passage 2! by way of the housing 28. The needle valve 32 is threaded to a cap 33 of the housing 28. Aspring-presse'd needle valve 34 is slidably mounted in the housing 21 and cooperates with the seat 30 in controlling the fuel to the passage 20 by way of the housing 21. link 35 is pivoted to the valve 34 and to an arm on the stem of the throttle valve so that said valve 34 will be caused to operate in unison .with the throttle valve. The common fuel inlet 29 is equipped with a fuel inlet 38 in which is located a strainer 31. 1

In operation, the needle valves 26 and 32 are manually adjusted to regulate the flow of fuel to the jet for the purpose of sustaining operation of the engine at idling speed. This fuel passes the check valve upwardly through the stem of the jet into the head l5 thereof. The fuel passes from the head by way of perforations 33 and meets with the air passing upwardly from the air chamber of the section 3 of fuel and air commingle and passes to the engine by way of the neck 3. As the throttle valve in is moved towards an open position to increase the speed of the engine .or to meet with increased load on the engine, the valve 34 is moved away from the seat 30 admitting additional amount of fuel which passes from the jet l4 and commingles with the air. Air also is drawn in at this time by the suction of the engine through the auxiliary air inlet 12. r

Arranged in the section 2 of the carburetor and about the jet is a substantially dome-shaped wall 33 spaced from the discharge end or head 55 Formed integrally with the member 19 are the carburetor. The

I! of the jet for the purpose of, directing the air in the direction of the escape of fuel from the jet to bring about an emcient mixing of the fuel and air.

It is to be understood that the Jet is raised by the suction from the engine to permit the ball valve to unseat and the disc valve I to move away from the seat I. This arrangement proportions the amount of fuel with the amount of air passing from the carburetor.

Havingdescribed the invention, I claim:

1. A carburetorcomprising a body including an air chamber and amixing chamber adapted to be connected to an engine, a throttle valve carried .by said body, a seat between the air chamber and the mixing chamber, a valve cooperating with saidseat to control air from the air chamber to the mixing chamber, a jet secured to said valve and mov"ble therewith under the influence of suction from the engine, saidbody having a pair of fuel passages, a housing slidably supporting the'jet and in communication with thefuel passages, a ball ,valve controlling fuel from said fuel passages to the housing and moved into a seating position by the jet, said je-t having communication with the housing, means for regulating the passing of fuel through one of the fuel passages, and means actuated by the throttle valve to control fuel through the other fuel passage.

2. A carburetor comprising a body including an air chamber and a mixing chamber'adapted to be connected to an engine, a throttle valve carried by said body, aseat between the air chamber and the mixing chamber, a valve cooperating with said seat to control air from the air chamber to the mixing chamber, a jet secured to said valve and movable therewith under the influence of suction from the engine, said body having a pair of fuel passages, a housing slidably supporting the jet and in communication with the fuel passages, a ball valve controlling fuel from said fuel passagesto the housing and moved into a seating position by the jet, said Jet having communication with the housing, means for regulating the passing of fuel through one of the fuel passages, means actuated by the throttle valve to control fuel through the otherxfuel passage,

said body having an auxiliary air inlet coma,oas,4'as

municating with the mixing chamber, and a suction actuated and self-closing gate for controlling the auxiliary air inlet.

' 3. A carburetor comprising a body including an air be connected to an engine, a throttle valve car-' ried by said body, a seat between the air chamber and the mixing chamber, a valve coacting with said seat to regulate the passing of air from the air chamber to the mixing chamber and actuated by suction from the engine, a Jet secured to said last-named valve and including a hollow stem and a perforated head, a housing slidably supporting the stem, saidbody having a pair of fuel inlets communicating with the housing, a ball check valve controlling the fuel from the passages to the housing and urged into seating position by the stem of the Jet, a spring acting on v the stem to urge the ball valve into seating position, a manually adjusted means for regulating fuel through one of said fuel passages to the chamber and a mixing chamber adapted to housing, and means connected to the throttle valve for automatically controlling the amount of fuel through the other passage to the housing and in accordance with th positions occupied by the throttle valve.

4. A carburetor comprising a body including an air chamber and a mixing chamber adapted to be connected to an engine, a throttle valve carried by said body, a seat between the air chamber and the mixing chamber. a valve coacting with saidseat to regulate the passing of air from the airchamber to the. mixing chamber and actuated by suction from the engine, a jet secured to said last-named valve and including a hollow stem and a perforated head, a housing slidably supporting the stem, saidbody having a pair, of fuel inlets communicatingwith the housing, a ball check valve controlling the fuel from the passages to the housing and u ged into seating. position by the stem of the jet, a spring acting on the stem to urge the ball valve into seating position, a manually adjusted means for regulating fuel through one of said fuel passages to the ho sing, a self-seating valve connected to the throttle valve and controlling fuel through the other fuel passage to the housing.

ANDY CARSON. 

